NABTEB GCE BIOLOGY PRACTICAL ANSWER

tolulope15

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Section A.No.1i.Robert HookeTheodor schleidenii. 1.Protection- the skin protects the body againstentrance by microbes, mechanical injuries, ultra-violet rays of the sunlight and desiccation byacting as waterproof.2. Excretion-the skin excretes excess water,minerals salts and some nitrogenous wastes through the sweat glands as sweatiii.1. It involves prolonged response2. It response to a particular stimulus may varyiv. Tabulate the folowingreflex action. 1. It occurs unconciousl.The rest is for subscribers who have d Pasword toView it

tolulope15

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2. Action is initiated by muscle receptor. Voluntary action.1. It occurs conciously2. Action initiated in the brain.V)1. Cytoplasm2. Plasma membrane vi)1. Protandry2. Protogynyvii.)Advantage of pollination1. It may not waste pollen grains 2. It aslo produces viable seedsdisadvantage of pollination1. It may lead to wastage of pollen grainsespecially pollination by wind2. The offspring or individuals produced are lessadapted to the environments viii.)Tabulate. Complete metamorphosis andincomplete metamorphosis.Complete metamorphosis.I. Four stage of development are involved.Ii. There is absence of nymph iii. There is no resemblance between pupa adultiv. There is presence of pupa (resting stage)incomplete Metamorphosisi. Three stage of development are involedii. Nymph is presentiii. There is resemblance between nymph and adultiv. There is absence of pupa (no resting stage)ix)1. Toad2. Agama lizardx) 1. Swelling up2. Secretion of irritating liquid3. Feigning death4. Hidingxi)1. Fingerprints 2. Intelligence3. Height of human4. Tongue rollingxii)1. Through there voice(sound and contact)2. Sh*cking of there head and feather (dancing) xiii)1. Spoilage of food2. Deterioration of materialsxiv)Advantages of self-fertilization1. Breads with required characteristicsare produced2. It leads to the productions of pure breedslinedisadvantages of self fertilization1. It leads to the production of weak offspring2. It leads to inbreeding despression xv)I. It lead to the production of healthieroffsprings2. Offspring or individuals produced are moreadapted to their environment conditions